Furnace Installation

How Much Space Should I Leave Open Around My Furnace?

Natural gas furnaces need sufficient space and airflow to run correctly.

Your furnace can shut down if it doesn’t have enough clearance. It also makes it hard for our technicians to complete furnace repair.

Annual furnace maintenance is essential to keep your system running trouble-free. A regularly serviced furnace may work more efficiently, which could lower your heating costs.

Related: How Does Furnace Maintenance Impact the Energy Efficiency of Your Home?

Maintenance often helps us spot troubles before they become expensive. This could help reduce future repair costs and likely extend the life of your system.

So how much room should your furnace really have?

How Much Space Does My Furnace Need?

If you’re finishing your basement or sealing off your furnace room, you should consult manufacturer specifications and Marshfield laws for clearance rules.

As a general suggestion, your heater should be 30 inches away from furnace room walls on all sides. This allows our service professionals to comfortably repair it.

You also need to make sure the area has ample airflow and ventilation, especially if you have an aging furnace with a metal flue.

Related: Furnace Service or Furnace Replacement: What to Consider

This model of furnace pulls combustion air from the surrounding space. If there’s not enough air, unsafe gas fumes and deadly carbon monoxide could back draft into your home.

If your furnace is positioned in a small room with a gas water heater, you may need to put in more openings. This could include a fully louvered door or vents in the walls.

Unsure if your furnace or water heater has adequate ventilation? We can help!

Contact us

You don’t need to assess airflow and ventilation as much if you have a up-to-date, high-efficiency furnace with PVC piping. Your unit uses one pipe as an exhaust vent and the other to pull in air.

Keep Combustible Materials Away from Your Furnace

Although furnace rooms function as laundry and storage space, you should keep yours free of items that could be fire hazards.

This includes:

  • Clotheslines
  • Cleaning or laundry products
  • Gasoline, paint or paint thinner
  • Rags and papers
  • Wood scraps and sawdust
  • Used filters

If you have a cat, situate your litter box in another room. Cat urine contains ammonia, which could corrode your furnace’s heat exchanger. Plus, the furnace could move the stinky odors all over your home.

You should also regularly sweep around your furnace to stop dust from accumulating.

Related: Is it Time for Furnace Service or Replacement?

Request Expert Furnace Service 

Whether you want furnace replacement or annual maintenance in Marshfield, House of Heating Incorporated can expertly take care of your needs. Our highly trained technicians can repair any furnace model or brand.

Call us at 888-384-3163 or use our online scheduler to get an appointment today.

Back To Blog